i.TV is a free iOS app that provides a free guide to TV shows in your area as well as news about TV. The version 3.3 update works with the GetGlue service to check-in with your TV shows and share the information on Facebook or Twitter.
You can see in the screenshot here that a check-in is a simple icon tap in the i.TV interface. You can also see another new feature represented in the same screen: Tune-in Alerts. The “Set Alert” option lets you receive push notifications when that specific TV show is about to air.
You can find i.TV for the iPhone and iPad here:
i.TV (iTunes App Store)